Gun cotton is made by saturating cotton with nitric acid.

The hapd hardening Portland cement is obtained by

The process of adding the required quantity of water to quick lime in order to convert it into hydrated lime, is known a…

The commonly used lime for works under water or in damp situations is

Excess of silica in the clay

Eminently hydraulic lime is one in which the percentage of silica, alumina and iron oxide is

The compressive strength of perforated bricks should not be less than

Vicat's apparatus is used to determine the

The addition of pozzolana to Portland cement causes